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Figure out how to split the square in this math puzzle

Total reversals in scientific thinking are rare—but earth-shattering

Remarkable new treatments can free millions of kids and adults from the deadly threat of peanut allergy, tackling one of our fastest-growing medical problems

Washing waste from the brain is an essential function of sleep—and it could help ward off dementia

Letters to the editors for the April 2025 issue of Scientific American

Science in meter and verse

DNA holds our genetic blueprints, but its cousin, RNA, conducts our daily lives

The second Trump administration is proving to be more disastrous for the climate and the clean energy economy than many had feared.  Donald Trump’s One Big Beautiful Bill Act repealed most of the clean energy incentives in former president Joe Biden

How do you want your AI to treat you?  It’s a serious question, and it’s one that Sam Altman, OpenAI’s CEO, has clearly been chewing on since GPT-5’s bumpy launch at the start of the month.  He faces a trilemma. Should ChatGPT flatter us, at the risk

More and more kids are turning to artificial intelligence chatbots for social interaction. We are scrambling to understand the pros and cons of their use